99 Third Ave, Waltham, MA 02451


Our name derives from the Italian word meaning a restaurant serving wine and simple food, “osteria,” and the Italian phrase meaning to sit and relax, “posto.” This approach to heartfelt hospitality and thoughtful food characterizes our take on today’s Italian steakhouse. We serve composed Italian dishes featuring locally sourced meat and seafood, homemade pasta, small bites, and seasonal flavors.

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Meet the Chef

Joe Cassinelli


Raised by a food-loving Italian family in Milford, Massachusetts, Joe Cassinelli has early memories of his Nonna’s handmade pastas drying in the kitchen and preparing meals at home for his encouraging parents. Joe’s childhood interest in cooking and baking led to a job at a neighborhood steakhouse, where he worked as a busboy and dishwasher before trying his hand behind the line one night when the sautée chef failed to show up for his shift. Joe excelled in the role and was soon following in the footsteps of the restaurant’s head chef, a graduate of the Culinary Institute of America who served as a sponsor as Joe applied to the lauded program.

After graduating from the CIA in 1997, Joe quickly accepted a Garde Manger position at Boston’s formidable Seasons restaurant at The Regal Bostonian Hotel to further hone his skills under the leadership of CIA alumni Chef Peter McCarthy.

Moving from one Boston landmark to another, Joe took on the role of Poissonier at Mistral, Chef Jamie Mammano’s acclaimed flagship addition to the Columbus Hospitality Group. Joe’s seven years at Mistral refined his craft and taught him the finer points of restaurant management. In 2002, he helped the group open sibling restaurant Teatro as the Executive Sous Chef, and eventually returned to Mistral to helm the kitchen as Chef de Cuisine for two years. After more than a decade with Columbus Hospitality Group, Joe jumped at the opportunity to tackle his first Executive Chef position in 2005 on the opening team of South End restaurant Stella. During Joe’s tenure, Stella quickly became one of Boston’s hottest restaurants, known for its sleek setting and upscale Italian menu.

In 2006, Joe headed to the San Francisco Bay for a firsthand look at the vibrant West Coast food scene. He took the year to explore wine country in the Napa and Sonoma Valleys, fully embracing local industry and viticulture and forging lasting relationships with many talented artisans and producers. Before long, Joe yearned for his East Coast roots, and in 2008 he found himself back in Boston to take the reins at the Columbus Hospitality Group’s Tuscan-inspired venture, L’Andana.

Inspired by his experience with Italian cuisine in various restaurant settings, Joe set off on what would prove to be an invaluable culinary tour of Italy in 2009. He immersed himself in the country’s regional culture and cuisine, and was immediately enamored by the home-cooked food and warm hospitality that was readily integrated into daily life. He sought to carry that heartfelt approach to food and hospitality over to Boston, which he accomplished by founding Alpine Restaurant Group in 2009 and bringing his first solo venture, Posto, to the burgeoning Davis Square neighborhood.

Opening its doors in 2010, Posto embodied the warm, simple elements of Italian hospitality and cuisine that Joe admired, while modernizing the classic trattoria with wood-fired pizzas, grilled meats & fish, handmade pastas and an Italian-leaning wine list. The restaurant’s Neopolitan-style pizza was the first in New England to be certified by the Associazione Verace Pizza Napoletana, an impressive mark of authenticity.

In 2012, Joseph went on to expand his presence in the restaurant community in Davis Square by opening his second restaurant, The Painted Burro. The Burro, as it is commonly referred to, is a Mexican restaurant that features over 100 tequilas and 20 Mezcals and had the opportunity to showcase itself at the James Beard House. 2013 brought the Painted Burro’s expansion into what is now affectionately know as the Burro Bar.

In 2014, Alpine group launched Rosebud American Roadhouse in Davis Square, Somerville after an extensive remodel of the landmark Rosebud diner originally built by the Worcester dining car company.

Osteria Posto, opened November 2015, is the culmination of Joe’s years of experience running some of Boston’s finest kitchens and his experience touring Italy’s culinary scene to deliver a concept that channels traditional fare elevated by modern twists.


Robert Fathman

Executive Chef

Over Robert Fathman’s lengthy thirty-year career, the Midwestern-bred chef has had a hand in conceptualizing and opening more than eleven restaurants spanning the country. Working his way from one coast to the other (with a few stops in between), Robert fine-tuned his skill set to master concept and menu development, as well as thoughtful hospitality and guest service. Though his resume covers several types of cuisine – coastal classics, Irish pub and new American fare, steakhouse staples – Robert’s main focus and true passion since childhood has been Italian food, which he explores now at Osteria Posto in Waltham.

Growing up on his family’s farm nurtured an early appreciation for home-grown meats and produce, and treating each ingredient with integrity. Building on this grass roots approach to cooking, Robert enrolled in Cincinnati’s Culinary Arts Academy and earned his certification in 1984. From there he headed out west to open and operate a slew of LA-area restaurants as the Corporate Chef for the Kings Seafood group.

With national acclaim at spots like Watergrill, i Cugini, Ocean Avenue Seafood and 555 East came a drive to impact the dining scene in his native Cincinnati, and Robert returned in 1991 to serve as Executive Chef of the multi-concept Waterfront Grill. After helming the venue’s fine dining concept, regional Italian restaurant and two nightclubs, Robert realized the high-energy city life of the Northeast was where he belonged.

Making his New England debut in March 1992, Robert immediately made his mark by reconcepting Boston steakhouse Grill 23 & Bar to a contemporary style of polished, yet relaxed service. After five spent as Executive Chef collaborating with his team to bring the restaurant financial and culinary success, Robert decided to take his development experience to a boutique hotel setting at XV Beacon, where he opened The Federal to numerous awards and accolades.

Having officially caught the hotel bug, Robert headed to the South Shore in 2001, taking up executive chef residence at the Red Lion Inn, another multiple-concept destination with a jazz club, New England pub, fine dining restaurant, bakery and banquet hall. Come 2004, he was back in Boston at the upscale Lenox Hotel opening such Back Bay staples as City Bar and Solas.

Ever the forward-thinker in restaurant development, Robert next helped colonize the once-neglected Seaport neighborhood with Legal Harborside, a three-level seafood haven on Boston’s waterfront that was recognized in 2011 among Esquire’s Best New Restaurants.

In his latest role, Robert joins longtime friend and colleague Joe Cassinelli of Alpine Restaurant Group to partner on the Waltham restaurant Osteria Posto, an elevated iteration of the group’s beloved wood-fired oven concept Pizzeria Posto in Somerville. As Chef, Robert connects his interest in catalyzing business development with a lifelong enthusiasm for local, seasonal ingredients and home-cooked regional Italian fare.

Private Events

North & South Rooms

Osteria Posto offers an accommodating and sleek atmosphere for large private events and business meetings. The restaurant’s private function area, with seating for 100 and standing room for 150, is equipped with full audio/visual capabilities and Wi-Fi—perfect for events, presentations, meetings, or private dining. Osteria Posto is also available by special request for complete buy-out events which can accommodate up to 250 guests.


Want us to cater your event? We can bring our food truck to you.

Learn More


Monday – Friday

11:30am – 10pm

Saturday – Sunday

5pm – 10pm


5pm – 9pm


99 Third Ave

Waltham, MA 02451

(781) 622-1500